If you have a smartphone running Android you definitely know Shazam, the popular music recognition app and service that helps you identify tracks by holding your smartphone close to the music source. With eBay’s sponsorship, users of the free application get free unlimited tagging until January 1, 2012.

Previously, Shazam was charging around $6 to identify unlimited music but there’s no need for that now as eBay is putting in some money (read ads) to cover all that for you. Additionally, the new version 3.0 introduces qHD (960 x 540) resolution support, Shazam Friends and faster loading of Music Tag Results and Charts. Check out a demo below and head over to the Android Market to get the app.